Effects of Exogenous Nitric Oxide on Mineral Nutrition and Some Physiological Parameters of Maize Grown under Salinity Stress

In the present study, the effect of nitric oxide (no) on growth, mineral nutrients concentrations and some physiological properties of maize under salt stress condition was investigated. for this propose, 40 mm nacl (except control), exogenously applied sodium nitroprusside (snp) as a no donor, and methylene blue (mb), as a no scavenger, (0, 0.5 and 1.0 mm) were supplied. results of this study showed that, nacl and snp applications were significantly decreased when plant fresh and dry weight compared to control. membrane permeability, lipid peroxidation, measured in terms of malondialdehyde (mda) content, excised-leaf water loss, and relative water content, stomatal resistance and proline accumulation were not affected by nacl and snp treatments. nitrogen, p, cl, na, mg, fe, zn, cu and mn concentrations of maize plant were significantly affected, however no significant effect on the k and ca concentrations of maize plant was observed. nitrogen, na, cl, na, k, ca, mg, fe, zn and mn concentrations were increased by increasing levels of snp. the results of this study indicated that high doses (0.5 mm and 1.0 mm) of exogenously applied sodium nitroprusside (snp), as a no donor, had not positive effect to improve plant performance against salinity stress.